How do I use RC9 - RC12?

I see there are parameters for RC9 - RC12, but there are only outputs for 8 channels. How could these be utilized?

Read the documentation!

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Iskess,
A few hints here:
plane.ardupilot.com/wiki/ardupla … Parameters

The new Pixhawk has auxiliary RC ports for this.
The PX4 has a few embedded in the multi function connector, and if I recall right, configurable on some of the UART pins (to use with gimbal Control)
The APM 2.5/6 - I don´t remember…

What hardware version are you using? :slight_smile:
/ Tom

Normally, this kind of post should be deleted without comment!

[color=#00BF00]@iskess: You are already in this forum here for a while but you still haven’t read the rules and the “read me first posts”.

So again, read the documentation thoroughly and if you still have questions, provide all necessary information as instructed in the “Read me first” posts. In the future I will delete posts which are in exception of the rules and instructions without further notice.[/color]

Wow, that’s quite a harsh reaction. I have read the wiki many times over, and I have read your rules and intend to comply.
I did forget to list the type of FC I was using, and for that I apologize. The rest of the information requested in the rules is not pertinent to the question.
I have an APM 2.5.2 and I simply need to know how to utilize the upper channels when the APM only has 8 outputs. Is it somehow possible to use the Analog ports, is there a breakout board?
If the answer is that RCxx_FUNCTION 9 - 12 are only for the Pixhawk and PX4, and don’t apply to the APM, then thank you Tom.

This is not explained in the wiki, and if it is, then I’m sorry for missing it.

On a genuine 3DR APM, rc9 = analog 9, rc10 = analog 10, etc. That is explained - among others - in the documentation on camera gimbal setup. Note that you MUST NOT simply connect servos to those ports! The power has to come from another source. Explanation and instructions are also in the documentation.

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[quote=“StefanG”]On a genuine 3DR APM, rc9 = analog 9, rc10 = analog 10, etc. That is explained - among others - in the documentation on camera gimbal setup. Note that you MUST NOT simply connect servos to those ports! The power has to come from another source. Explanation and instructions are also in the documentation.

Sent from my Ainol Novo 7 Fire using Tapatalk[/quote]

I don’t use a camera gimbal so I hadn’t reviewed that section.

Here is what I found under the heading “Connecting Gimbal Servos”:
■For APM 2.x: ch5, ch6, ch7, ch8, ch9, ch10 and/or ch11 (Note ch9, ch10 & ch11 have a factory trace connecting to the correct digital out pin for servo or relay).
■For the APM 2.x board for ch9, ch10 and/or ch11 ensure that the jumper trace(s) on the bottom of the board have not been cut and that they have not been re-jumpered for analog use.

So lets say I am using APM: Plane and assign RC11_Function = 2 (Flaps). Can I simply attached the Flap servos signal wires to A11? Don’t I have to map the input to the output somehow? How will the APM know where to look for my flap switch when I am wanting to deploy them in Manual mode? These upper channels don’t exist in the Radio Calibration page. With the gimbals you also need to assign the input channel eg. MNT_RC_IN_TILT. However it appears that only RC5-RC8 are available as inputs for gimbals.

Again, I’m sorry if I’m being dense and the answers are right in front of my face. I have helped many people on DIYDrones and maybe a few here, so perhaps I’ve earned a pass.

[quote=“iskess”][quote=“StefanG”]On a genuine 3DR APM, rc9 = analog 9, rc10 = analog 10, etc. That is explained - among others - in the documentation on camera gimbal setup. Note that you MUST NOT simply connect servos to those ports! The power has to come from another source. Explanation and instructions are also in the documentation.

Sent from my Ainol Novo 7 Fire using Tapatalk[/quote]

I don’t use a camera gimbal so I hadn’t reviewed that section.

Here is what I found under the heading “Connecting Gimbal Servos”:
■For APM 2.x: ch5, ch6, ch7, ch8, ch9, ch10 and/or ch11 (Note ch9, ch10 & ch11 have a factory trace connecting to the correct digital out pin for servo or relay).
■For the APM 2.x board for ch9, ch10 and/or ch11 ensure that the jumper trace(s) on the bottom of the board have not been cut and that they have not been re-jumpered for analog use.

So lets say I am using APM:Plane and assign RC11_Function = 2 (Flaps). Can I simply attached the Flap servos signal wires to A11? Don’t I have to map the input to the output somehow? How will the APM know where to look for my flap switch when I am wanting to deploy them in Manual mode? These upper channels don’t exist in the Radio Calibration page. With the gimbals you also need to assign the input channel eg. MNT_RC_IN_TILT. However it appears that only RC5-RC8 are available as inputs for gimbals.

Again, I’m sorry if I’m being dense and the answers are right in front of my face. I have helped many people on DIYDrones and maybe a few here, so perhaps I’ve earned a pass.[/quote]

Ok, I think I am starting to realize that the APM2.x doesn’t not allow more than 8 RC inputs even though I am feeding it 12 channels via PPM. The RCxx_Function only selects outputs.
Why does the RCxx_Function parameter allow options that include primary flight controls? I’m guessing that this is for the PX4 and Pixhawk? I don’t know. I’m I on the right track here?

Because it saves codespace and memory to have the same routine serve all outputs and it’s future-proof.

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yes, this is a bit confusing. The limitation to 8 RC inputs on APM2 is a limitation in the PPM encoder firmware, and really stems from the fact that the core developers tend to only have transmitters that send 8 channels! I’ve just bought a FrSky Taranis which has 16 channels and I immediately noticed this.
You can have more channels on PX4 and Pixhawk, although it isn’t well tested yet. I suspect it will become more tested as I play with my Taranis a bit more :slight_smile:
Cheers, Tridge

[quote=“tridge”][quote=“iskess”]
Ok, I think I am starting to realize that the APM2.x doesn’t not allow more than 8 RC inputs even though I am feeding it 12 channels via PPM. The RCxx_Function only selects outputs.
[/quote]
yes, this is a bit confusing. The limitation to 8 RC inputs on APM2 is a limitation in the PPM encoder firmware, and really stems from the fact that the core developers tend to only have transmitters that send 8 channels! I’ve just bought a FrSky Taranis which has 16 channels and I immediately noticed this.
You can have more channels on PX4 and Pixhawk, although it isn’t well tested yet. I suspect it will become more tested as I play with my Taranis a bit more :slight_smile:
Cheers, Tridge[/quote]

Thank you for answering Tridge. I know you’ll enjoy your new Taranis, it’s a programmer’s dream.